if it was george zimmerman's voice, if trayvon martin and he got into an altercation, and trayvon really was smashing his head into the concrete and he really was screaming out and genuinely feared his life might be in danger, would that give him justification for taking the action that he did. >> i think that's strong justification for self-acquittal. on the other hand i think if you feel that it was trayvon martin yelling out and screaming, it's a very different case. >> here's the problem, we just don't know that. we're not going to know that, we're not going to know so many things about this, the only two people who know, one is dead, trayvon martin. and one is george zimmerman, fighting for his -- not for his life, but fighting for his freedom. either way, he could be found guilty of manslaughter and still get 20 years because trayvon was 17 years old. >> that's very true, and that may be justice in the case, you're absolutely right, it's a circumstantial case, the evidence is circumstantial. the evidence is really what story you believe. the defense is telling a very different stor